.CHARACTER IS TREATING Americans to all kinds of spectacles. On April 8th thousands observed an overall solar eclipse. Several will be actually less magnetized when, in the coming days, mountains of cicadas seem in the nation's Midwest and also south-east. The throng is going to be uncommonly big because 2 sorts of the insect-- Brood XIII as well as Brood XIX-- are developing at the same time. The final opportunity they seemed all at once resided in 1803, when Thomas Jefferson was head of state. Why perform the cicadas have such an unique life cycle?